When to Visit the ER for a Headache
By Dr. Sudheer Pandey · May 5, 2026
Quick answer
Go to the ER immediately for sudden severe headache, headache with fever and stiff neck, headache after head injury, or headache with weakness, confusion, vision loss or seizures — otherwise book a neurologist for recurring headaches.
When to visit the ER for headache: most headaches are not emergencies. Tension headache and migraine are painful but not life-threatening. However, certain headache patterns mean you should go to the emergency room immediately — not wait for a clinic appointment tomorrow.
Go to the ER now if you have: sudden severe headache reaching maximum intensity within seconds to minutes ('thunderclap' or 'worst headache of my life') — this can indicate brain haemorrhage. Headache with fever, neck stiffness and rash — possible meningitis. Headache after significant head injury — possible bleed inside the skull. Headache with new weakness, numbness, slurred speech, confusion, seizures or loss of consciousness — possible stroke. New headache with painful red eye and visual halos — possible acute glaucoma.
Go to the ER the same day if: you are over 50 with a completely new type of headache you have never had before; your headache woke you from sleep and is worse every morning for a week; you have cancer or HIV and a new severe headache; you are pregnant with severe headache and vision changes or leg swelling — possible pre-eclampsia.
You do not need the ER for: typical migraine attacks that match your usual pattern and respond to your usual treatment; tension headache after a stressful day; headache when you have a cold or sinus infection without high fever or neck stiffness; chronic headaches you have had for months without any new neurological symptoms.
When to see a neurologist (not ER): headache on more than 4 days per month, headaches that last more than 72 hours despite medication, increasing painkiller use, headaches waking you from sleep regularly without other red flags, or any headache that is affecting work and quality of life. Book within 1–2 weeks — not years.
After the ER: if scans and examination are normal but headaches continue frequently, see Dr. Sudheer Pandey or another neurologist for a preventive plan. The ER rules out danger; a neurologist fixes the pattern.
Bottom line: sudden, severe, new or neurological-symptom headaches → ER now. Recurring familiar migraines or tension headaches → neurologist appointment. If you are unsure and symptoms are sudden and severe, choose the ER.
